前言
小程序有一个获取用户很便捷的api,就是通过getPhoneNumber获取用户的已经绑定微信的手机号码。有一点要大家注意,现在微信和注重用户体验,有些方法都是需要用户主动去触发才能调用的,比如getPhoneNumber。
实现思路:
1、通过wx.login获取code,从而获取到用户的openID和sessionKey
2、通过getPhoneNumber获取encryptedData,iv
3、通过参数【encryptedData】 、【iv】 、【sessionKey】 请求后台解密获取用户手机号
直接上干货:
1、用户点击获取用户手机号码按钮
<button class='pop_btn' plain="true" open-type='getPhoneNumber' bindgetphonenumber="getPhoneNumber">获取用户手机号</button>
2、弹出授权图片:
3、通过解密获取手机号码
直接上代码:
wxlogin: function() { //获取用户的openID和sessionKey var that = this; wx.login({ //获取code 使用wx.login得到的登陆凭证,用于换取openid success: (res) = >{ wx.request({ method: "GET", url: 'https://xxxwx/wxlogin.do', data: { code: res.code, appId: "appIdSbcx", appKey: "appKeySbcx" }, header: { 'content-type': 'application/json' // 默认值 }, success: (res) = >{ console.log(res); that.setData({ sessionKey: res.data.session_key }); } }); } }); } getPhoneNumber: function(e) { //点击获取手机号码按钮 var that = this; wx.checkSession({ success: function() { console.log(e.detail.errMsg) console.log(e.detail.iv) console.log(e.detail.encryptedData) var ency = e.detail.encryptedData; var iv = e.detail.iv; var sessionk = that.data.sessionKey; if (e.detail.errMsg == 'getPhoneNumber:fail user deny') { that.setData({ modalstatus: true }); } else { //同意授权 wx.request({ method: "GET", url: 'https://xxx/wx/deciphering.do', data: { encrypdata: ency, ivdata: iv, sessionkey: sessionk }, header: { 'content-type': 'application/json' // 默认值 }, success: (res) = >{ console.log("解密成功~~~~~~~将解密的号码保存到本地~~~~~~~~"); console.log(res); var phone = res.data.phoneNumber; console.log(phone); }, fail: function(res) { console.log("解密失败~~~~~~~~~~~~~"); console.log(res); } }); } }, fail: function() { console.log("session_key 已经失效,需要重新执行登录流程"); that.wxlogin(); //重新登录 } }); }
后台代码:
/** * 解密并且获取用户手机号码 * @param encrypdata * @param ivdata * @param sessionkey * @param request * @return * @throws Exception */ @RequestMapping(value = "deciphering", method = RequestMethod.GET) public @ResponseBody String deciphering(String encrypdata, String ivdata, String sessionkey, HttpServletRequest request) { byte[] encrypData = Base64.decode(encrypdata); byte[] ivData = Base64.decode(ivdata); byte[] sessionKey = Base64.decode(sessionkey); String str=""; try { str = decrypt(sessionKey,ivData,encrypData); } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); } System.out.println(str); return str; } public static String decrypt(byte[] key, byte[] iv, byte[] encData) throws Exception { AlgorithmParameterSpec ivSpec = new IvParameterSpec(iv); Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding"); SecretKeySpec keySpec = new SecretKeySpec(key, "AES"); cipher.init(Cipher.DECRYPT_MODE, keySpec, ivSpec); //解析解密后的字符串 return new String(cipher.doFinal(encData),"UTF-8"); }
总结
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